Question

1 true or false 1 point
hydride ions have a charge of -1.
true
false
2 true or false 1 point
alkali metals are group 2 on the periodic table.
true
false
3 multiple choice 1 point
metals are usually ____ at room temperature and nonmetals are usually ____ at room temperature.
gas, gas
solid, gas
solid, liquid
liquid, liquid

Explanation:

Question 1

Hydride ion is \( \text{H}^- \), which has a charge of -1. So the statement is true.

Alkali metals are in group 1 of the periodic table, while group 2 elements are alkaline earth metals. So the statement is false.

Most metals are solid at room temperature (e.g., iron, copper). Most nonmetals are gases at room temperature (e.g., oxygen, nitrogen). So the correct option is "solid, gas".

Answer:

True

Question 2